Aircraft machine gun camera



Aug. 13, 1935. J. P. GATY AIRCRAFT MACHINE GUN CAMERA Filed June 21, 1934 3 Sheets-Sheet 1 11.1.1 I ..1 Nini F LQ INV ENTOR fa A'ITRNE Aug. 13, 1935. 1 P GATY 2,011,358

AIRCRAFT MACHINE GUN ,GAMERA Filed June 2l, 1934 3 Sheets-Sheet 2 Z3 Z 6g mvENToR A Jaim? aly BY ATTQRNEYS AU8 13, 1,935- J. P. GATY 2,011,358

AIRCRAFT MACHINE GUN CAMERA Filed June 21, 1934 5 Sheets-Sheet I5 INVENTOR We M ATTORNEYS Patented Aug. 13, 1935 UNITED STATESv 2,011,358 l Anwaar'r MACHINE GUN CAMERA John P. Gaty, Woodside, N. Y., assignor to Fairchild Aerial Camera Corporation, a corporation of New York Application June v21, 1934, Serial No. 731,593

11 Claims.

This invention is a continuation in part of my application flled May 26, 1933, lSerial Number 672,946, for improvements in machine gun camera, and relates in general to photographic cameras and more particularly to that type of camera known in the art as machine gun cameras, that is to say, cameras simulating the form of a machine gun and whereby the accuracy of the manipulation of the machine gun in target practice may be checked by inspection of the pictures taken.

An object of the invention is to provide such a device wherein a single main lens may be utilized for the purpose of photographing both an object ata long distance and a watch at a short distance withinA the camera, so as to constitute a time record of the exposures taken.

Another object of the invention is to provide suitable filters whereby these two results may be obtained by the use of a single main lens, and to provide means whereby this lens may be focused for long range objects or whereby the focus of the main lens may be corrected by an auxiliary or correction lens and prism introduced into the path of light for accomplishing photographic exposure of objects located within the casing of the camera device. g

Another object of the invention is to provide an optical system, simple in nature and inexpensive as to cost, whereby fast lenses of'high aperture ratio may be used, so as to increase shutter speeds far beyond those in conventional use, by means of the increase of light transmitting ability.

A still further object of the invention is to use and'arrange such a lteryso that it will not act upon the rays of an illuminated watch, a picture of which is to be recorded, but only the rays from the objects at a substantial distance. pose of this is v,to hold back the exposure of objects in the sunlight without making necessary excessive illumination on the watch, which may be photographed at the same lens openingor aperture and at the same shutter speed as the object in sunlight.

A still further object is to provide such a device as to consist of afremovable self-contained moving pictureI camera unit and a removable watch `unit both of whichfwill be, readily installed and removable from the device in their proper relation without necessity for adjustment. In this connection, an object of the invention is to provide a novel and efficient means of manual adjustment of the optical system, including light reecting prisms, a main lens and a correction lens.

A still further and, important object of the invention is the provision and pre-arrangementv of the operating parts of the device, whereby a definite sequence of operation is predetermined so as to allow forthe ta-king of any desired number of pictures and an exposure on one of said pictures of a record of the time of day as well as the serial number of the series of pictures taken, this to be effected by the mere manual operation of a conventional shutter tripping device. 4

With the foregoing and other objects in view, the invention consists in the combination of parts and in the details of construction hereinafter set forth in the following specification and appended claims, certain embodiments thereof being illustrated in the accompanying drawings, in which:

Figure 1 is a side elevation of the device;

Figure 2 is a view similar to Figure 1 with one of the side walls of the casing removed;

Figure 3 is a .view in longitudinal section taken along line 3 3 of Figure 2;

Figure 4 is a view in section taken along line 4 4 of Figure 2; o

Figure 5 is a view in section taken along line 5-5 of Figure 2;

Figure 6 is an enlarged detailed view of a portion of the device showing the operating means for the movement of the correction lens and prism and showing in full lines the device` in position for taking a series of pictures of long range objects, and in dotted lines the positions the prism and correction lens assume for taking pictures of the watch within the casing;

Figure '7 is a view taken at right angles to Figure 6 showing a top-view of the same.

Figure 8 is an enlarged detailed section similar to Figure 3 and taken along line 8 8 of Figure 10 showing the lighting switch in its inoperative position with its contacts open;

Figure 9 is a view similar to Figure 8 showing the lighting switch in its operative position with its contacts closed; 45

Figure 10 is a view in section taken along line lli-I0 of Figure 8;

Figure 1l is a view in section taken along line Il II of Figure 8;

Figure 12 is a detailed enlarged view in perspective of the spring contact member of the lighting switch.

Referring more particularly to the drawings, the device consists of a main casing l, in which the operative parts of the mechanism are en- 55.

closed, a pair of handles 2, by means of which the device may be pointed in the desired'direction, a gun barrel 3, and a conventional ringsight consisting of the usual elements 4 and 5 to simulate the appearance of a machine gun as used particularly on aircraft.

The main casing is provided in its upper wall with a door 6, hinged at 1, through which a removable self-contained standard moving picture camera unit 8 may be inserted and which, when inserted, is self-aligned in its proper predetermined position, by means of longitudinally' acting leaf spring 9, side springs |I and guideways III, and furthermore by means of a similar leaf spring I2 carried by the door 6, when the latter is closed after the insertion of the camera unit. A compartment |35 may be provided for batteries |36 removably held in place by the in place of the counter, and a vslide I3 for carryl ing a series of lamp bulbs I1 with contact devices I6, lead wires I9, this electrical unit being suitably connected to the wiring circuit of the device for predetermined illumination of thelamp bulbs when it is desired to take a photographic exposure of the watch and the counter. The counter may be set by a hand knob |3I on a shaft |32 carrying a gear |33, meshing with a gear |34, which may indirectly operate the counter.

The device further consists of a light aperture 26- and a filter device 2|, constituting the only means for admission of outside light for thetaking of pictures of objects external to the device, while the lamp bulbs constitute the means of killumination of the watch, for taking pictures of the latter. A single main photographic lens is employed for these two operations and is shown at 22. There is also provided in the optical system a stationary prism 23 and a movable prism 24, which latter is adapted to be moved in conjunction with a correction lens which it carries so as to be out of the path of the light rays utilized by the lens to photograph lthe external object and to be moved into said path and in proper position for permitting the taking of the picture" of the watch which is on a higher plane than the cone of light passing through the lens from the external source. This movable prism 24 has arranged in its face a diaphragm 24 near the correction lens, this diaphragm being of the form indicated inFigure 6.

In accomplishing these two operations, the mechanism involved briefly consists of a trigger 25 adjacent the spade grip handles, and a long operating bar 26, which, through other actuating elements, is adapted to elevate the prism and correction lens when it is desired to take a pieture of an external object upon the forward movement of the operating bar, and upon the return movement of the operating bar to cause the prism and correction lens to be lowered and also cause the lamps to be illuminated, for the purpose of taking a photographic exposure of the watch.

In considering the sequence of operation of the operating elements throughout the entire cycle as well as the photographic results obtained thereby it should beborne mind that the single photographic lens is stationary and that a correction lens is employed in conjunction with the movable prism, the movable prism and correction lens moving as a unit.

When the operator desires to take a series of pictures, of external objects, all that is required to do is to press downwardly upon the lever 25', which is pivotally connected to the casing by means of a shaft 21. The trigger lever is provided wi'th an integral downward extension 25', which is secured to a bracket 23 having an extension 29, about which is arranged a roller 3l) mounted in a channel 3| carried by the bar 26. The flat operating bar 26 carries a plate 32 adapted to slide u nder a bracket 34 secured at 35 to the casing but formed with lugs .33 and 36 which by their abutment against either side of the bracket act respectively as limiting stops for the forward and rearward movement -of the bar 26. The bar 26 also carries a post 31, there being secured thereto and to the plate 34 a tension spring 38.

Referring to Figures 2 and 6, the operating Abar 26 extends forwardly and is adapted for reciprocatory motion, and at its. forward end is pivotally attached, at 48, to a link 49, which latter is eccentrically pivotally connected at to a disc 5|, concentrically mounted on a shaft. 52, so as to be rotatable therewith. Mounted loosely on the shaft 52 is a block 53 carrying prism 24 and a correction lens 54 so'that the prism and correction lens may be moved out of the way for taking a series of pictures of long range objects -when in the position shown'in full lines in Figure 6, and also later assume the position shown in Figure 2 and in dotted lines in Figure 6 for taking a single exposure of the watch by reflection through means of the stationary prism 23.

The operation of the trigger and the consequent operation of the operating bar 26 in rotating the disc 5| transmits this rotary movement to the block 53 through the medium of the pin 12 which engages with the end of the recess 1I, in the disc 5 I, and is fastened in block 53. The disc 5I is also provided with an arcuate slot 56 with eccentric extensions 59 andI 60 to receive a pin 6I.

Pin 6| is xed to and carried by an angular at bar 62, which extends rearwardly and is adapted for longitudinal sliding movement and is provided at its rear end with an operating hook 63,- adapted to engage a suitable element 64, for setting in motion by any suitable means a standard moving picture camera unit. In other words, the forward and rearward movement of the main operating bar 26 brings about the present described motion of the flat bar 62, in suchga man-V ner that at a'certain predetermined point in the forward movement of the operating bar 26 through the medium of the at bar 62 the camera mechanism is set into operation so as to take a numvber of Apictures of arr exterior object.

A reverse movement ,of the iiat bar 62 is ef-v fected so as to again set the camera mechanism into operation, so as to takea single picture of the interiorly located watch; this latter function also taking place at a predetermined point in the return movement of the main operating bar. In order to bring this result about it must beremembered that the forward movement of the main actuating bar 26 causes a rotation of the cam disc 5I in a clockwise direction, and that during this movement the pin 6| rides in the groove 56, and so long as the pin remains in the concentric portion of the groove, no movement is` imparted to the camera operating bar 62.

The pin 6I is in the upper extremity of the concentric portion of the groove 56 just below the eccentric portion 59 just after the actuation of the camera for a series of exposures of the exteriorly located object, as the cam disc 5| is being rotated counterclockwise by the return movement of the bar 26 and the pin 6| has been forced out of the upper eccentric groove 59 into the concentric portion 58. After the disc 5| has been rotated further in a counterclockwise direction by a rearward movement of the operating bar 26, pin 6| is just above the lower eccentric portion 68, the lamp bulbs having been illuminated and the prism and correction lens being set in position for taking a single picture of the watch, which occurs as the pin 6| is forced to ride in the eccentric portion 60, as this imparts a. movement of the camera operating bar 62 forwardly to bring this about. The pin 6| then rides in the groove extension 68 which is concentric and allows a movement of the light switch to extinguish 4the lamp bulbs.

As explained before, the-main lens is stationary and the movable prism and correction lens are moved into the position shown in dotted lines in Figure 6 when it is time for the exposure of the watch and in the position shown in full lines in Figure 6 when it is time for the exposure of externally located objects. In this connection it is also necessary to synchronize with the opera.-

tion of the camera mechanism the movement of the movable prism and correction lens so that they will be in proper position for taking pictures of exterlorly located objects and of the internally located watch in a predetermined sequence. To bring this about the movable prism and correction lens are also mounted so as to be rotatable with shaft 52, and the block 53 carrying the prism and correction lens is provided with a coil spring 89 wound around the shaft and bearing against the prism. This tends to force the prism and correction lens to a downward position which occurs, and is brought about through mechanism about to be described, when it is desired to take a single exposure of the watch.

To bring about the rotation of the prism, the disc 5| is also provided with a peripheral recess 1|, in which it is adapted to ride a pin 12 fixedly secured to the movable prism. It will also be seen by reference to Figure 6 that as the disc 5| is rotated in a clockwise direction, by means of' a forward movement of the actuating bar 26,the pin 12 will abut against the lower extremity of the recess 1|, in such a manner that the prism will be also rotated in a clockwise direction. This has the eifect of raising the prism from its lower position to a higher position so that it will be out of the path of the-light rays, so as to make it possible to take long range pictures. Upon the return movement of the actuating bar 26, the spring 68 acts to return the prism to its lower position,

this action of the spring being controlled by the limits of the recess 1|, and the engagement therewith of the pin 12. This movement of the prism takes eiect throughout the first 65 of movement and the remaining 25 of movement of the trigger bar has no effect towards moving the prism, as it is already in its full downward position. The recess 1| is therefore of substantial elongated form so as to allow for a certain movement of the disc 5|, necessary for the actuation of other elements of the device without moving the prism.

Referring now more particularly to Figures 2, and 8I to 12 inclusive, which illustrate in detail a switch mechanism for illuminating the bulbs for the watch', it must be borne in mind that this illumination of the watch occurs near the end of the return travel of the trigger bar 26. The switch may consist of a pair of opposed conl of a spring |18 fixed to the shaft |16.

tacts |18 and |14, the former being carried by the casing so as to be stationary, and the latter carried by a spring element |15 tending to urge the contact |14 into engagement with the contact |13.

'Also carried by the casing and loosely mounted on a shaft |16 is a rotatable element |11 normally urged in a clockwise direction by means This rotatable element is also provided with an abutment portion which is adapted to contact with the upper portion |15' of the spring |15, and by reference to Figure 8 it will be seen that a downward pressure on the spring |15 causes the contacts |13 and |14 to be disengaged and consequently the lamp lighting circuit, (not shown) of which they-form a part, keeping the circuit open. In this connection it might be stated that the preferable source of electrical energy for lighting lamps is a series of batteries |36, spring pressed by a spring |38 within the casing which may be inserted therein and kept there by a suitable screw knob |31, as shown in Figure 2.

Referring now again to Figures 8 and 9, th`e element |11 also comprises an extension |84 in the form of a slide to receive an element |85, pivoted at |86, which may also be in the form of a spring plunger, if desired.

The actuating bar 26 carries an operating bracket |81, the bracket being formed with outwardly depending bevelled edge |89,which is adapted for engagement with the member |85. It will be seen that a movement of the 'bracket |81,'from the position to the left ofthe element to the relativeposition shown in Figure 8, would cause no actuation or rotation of the assembly |11, inasmuch as the bevelled edge |88 would merely ride over element |85. Upon a return movement, however, of the actuating bar 26,

`the straight edge of the downward portion of the bracket |81 engages with the said edge of the member |85, as shown in Figure 9, so as to release the spring |15 from the downward pressure of the block |80 under the force of the spring |18, so as to allow the spring |15 to urge the movable contact |14 into engagement with the stationary contact |13 for the purpose of closing the circuit for illuminating the bulbs. This occurs after the expiration of 30 of the return travel of the trigger lever and continues for 50 until after which the lamp circuit is again open for the remaining 13. In order to bring this result about it will be seen by reference to Figure 9 that a further return movement of the bracket |81 to the left will result in the element |85 being freed from engagement with the bracket |81, after which time the spring |18 again rotates the assembly |11 clockwise, this resulting in the block |88 forcing the contact |14 out of engagement with stationary contact |13 against the aciion of spring |15. For purpose of adjustment of the movable block |80 with respect to the spring actuated' contacts, there may bc secured to the casing a stationary block |90, with an adjustment screw |9l, and nut |92, to limit the degree of lclockwise rotation of the block |80.

It will be appreciated that without the inertia or' ad effect of such an arrangement provided by the effecting an alteration of the light path is placed back of the filter, which latter also serves the additional useful purpose of screening the mechanism from dust and moisture.

It will also be seen that there has been provided a novel and efficient method of regulating the amount of light passed from the watch to the lens without any necessity for adjustment of the watch, or an adjustment of the illumination suitable shaft. which when it meshes with gear ||9 transmits the power from the drum to the shutter. The

thereof.

The entire device having been properly adjusted, it is only necessary to press downwardly upon the manual trigger element 25 to initiate a. complete cycle of operation of the device that results in the taking of a series of pictures of long range^ objects, and the last frame of each of said series having exposed thereon a picture of the watch and the serial number indicator of the series. The sequence of operation of the various parts of the device and the results obtained are best understood while referring to the various iigures showing the operating mechanism.

The shutter operating mechanism may be of any standard conventional type in conjunction with the camera unit 8 which is provided with a suitable exposure aperture |26. .The element 64 above referred to as an operating pin may be carried by a member pivoted at III. The lower part |30 of memberv ||0 moves between stops ||6 on the casing limiting the extent of movement of member I0 in either direction; The shutter |24 .provided with a suitable shutter opening is driven by shaft |22 carrying a bevel gear |23 meshing lwith a bevel gear |20Vcarried by a shaft |2| which also carries a latch disc ||1 and a gear I9 meshing with a larger gear |21 'which when it meshes with gear IIS transmits power from a suitable spring drum |28 carried by a The drum carries the gear |21 member IIB acts as a latch by contacting of forks |I2 and V||4 with a stop ||8 carried by a latch disc. 'Ihe movement of the spring drum gear |21 is counterclockwise'and that of the latch disc Il clockwise. When the forked member H0. as viewed in Figure 2 is oscillated in a counterclockwise direction about its pivot by a rearward movement 'of hook l63, the fork |2 is brought out of the path of stop I8 and the shutter is free to be driven by the spring drum for a series of pictures. A reverse rotation of member I0 brings fork ||2 into the path of the latch disc pin ||8 and further movement disengages fork ||2 and allows the disc to make one revolution before the pin strikes the fork H4, thus allowing one revolution of the shutter until the stop ||8 engages fork H4. Iii/this manner a single exposure is automatically taken of the watch, after each single or series of exposures of externally located objects. v

In summary, the forward movement of the trigger bar, initiated by the downward pressure of the trigger element 25, shifts the movable prism and correction lens upwardly out of the path of the light rays and starts the camera mechanism which takes a s'eries of pictures of external objects at long range. The return movement of the main trigger actuating bar follows automatically upon the release of pressure from the trigger and eiects the movement of the prism and correction lens into a downward position so as to be in the path of the light rays; closes the light circuit for illuminating the watch face; operates the camera unit to take a single exposure of the Watch face when illuminated; and lastly, opening of a lamp lighting circuit so as to constitute a complete cycle of operation. The whole operating system then lies idle until another actuation of the operating lever, at which time a similar cycle of operation is initiated and automatically completedf The optical system shown in the drawings includes a correction lens in connection with the main photographic lens instead of making the latter shiftable, thus reducing the number of working parts considerably.

I claim:

'1. In a camera comprising a casing, a shutter and means for tripping the same, a single photographicv objective and means aligned therewith i for providing a light path for photographic exposure of objects located exteriorly of said casing upon tripping of said shutter, an object located internally-of said casing and means for illuminating the same, a light reflecting system including a reflecting member movable into such relationship with said objective as to provide a secondary light path between said internally located object and the axis of said objective,

a correction lens to bring said objective into a predetermined focal relationship withsaid internally located object, .means co-ordinating' said movement of said reiiecting member and the tripping of said shutter for photographically exposing said internally located object.

2. In a camera comprising a casing, a shutter and means for tripping the same, a single photographic objective and means aligned therewith for providing a light path for photographic exi posures of objects located exteriorly of said casing upon tripping of said shutter, an object located internally of said casing and means for illuminating the same, alight reflecting system including a reecting member movable into such relationship with said objective as to provide a L secondary light path between said internally located object and the axis of said objective, a correction lens to bring said objective into a predetermined focal relationship with said inter- -nally located object, means co-ordinating said movement of said reflecting member and the tripping of said shutter for photographically exposing said internally located object, and control,

means for bringing about the movements of said reflecting member and the` tripping of said shutter in a predeterminedsequence.

3. In a camera comprising a casing, an object located within said casing and means for illuminating the same, a-shutter, an optical 4system including a main photographic objective, a movable reflecting prism, and a correction lens, means aligned with said main objective for admitting light rays from an external source, said prism being movable into a position to reflect light rayscaused by the illumination of said object into the mainobjective axis, means for shifting said prism and correction lens substantially simultaneously Vinto and out of the axis of said main-lens, means for tripping said shutter, control means for actuating said shifting and tripping meansl in a predetermined order with respect to each other for photographic exposure of objects located exteriorly of said casing when said prism and correction lens are positioned out of the main lens axis, said control means coordinating said tripping and shifti means with a means for provldlng artificial light within said casing for illuminating said internally located object and tripping said shutter while said prism and correction lens are positioned in the main lens axis and said internally located object is illuminated for photographic exposure of objects located interiyorly of said casing.

4. In a camera comprising a casing, an instrument located within said casing, a shutter, an optical system including a main lens and a correction lens and a movable reflecting, prism, means aligned with saidvmain lens for admitting .and ltering light rays from an external source, said prism being positioned so as to refect light rays from said instrument into the main lens axis, means for shifting said prism and correction lens as a unit into and out of the axis of said main lens, means for tripping said shutter, control means for actuating said shifting and tripping means in a predetermined order with respect to each other for photographic exposure of objects located exteriorly of said casing when said prism and correction lens are positioned out of the main lens axis, said control means coordinating said tripping and shifting means l Y with a means for providing artificial light within said casing for illuminating and photographically exposing said instrument when said prism and correction lens are positioned inthe main lens axis, said control means including a manually operable trigger bar and arotary elementactuated thereby, means rotatable ,with said element for causing the shifting of said correction lens and prism to be resiliently effected, said element being provided with a concentric groove with eccentric extensions near either end, said control meanshaving an operating member operatively lassociated with said groove and during the rotation of said rotary element adapted to be so actuated as to cause the operation of said shutter tripping means to be effected as the eccentric portions are alternately engaged.

5. In a camera comprising a casing, a photographic objective, a photographic lm and means for supporting the same, an object within said casing andoutside of the normal field of said objective, a shutter between said objective and film, means for tripping said shutter, a movable reflecting prism and correction vlens in front of said photographic objective, means for shifting said correction lens and prism as a unit into and out of the axis of said photographic objective for the respective purposes of altering the effective focal length of the'photographic objective and of providing a path for light from said internally located object into the field of said photographic objective, and control means adapted to operate the camera shutter and shifting means in a predetermined sequence to take a series of exposures ofobjects external of the casing while the correction 4lens and prism are positioned out of' the objective axis, and subsequently operate the shifting means to bring the prism and correction lens into a position within the field of. the -main objective, operate a means to provide illumination for said object located within said casing and actuate said shutter tripping means for photographically exposing said internally located object.

6. In combination, a camera operating mechanism comprising `a drive means, a shutter, and means for controlling the same, a main photographic objective, a control means and a correction lens movable into different positions thereby for altering the effective focal length of the main photographic objective, a reflecting prism movable as a unit with said correction lens for introducing into the field of said objective light from a near object inthe casing and normally `outside the field of said photographic objective and the zone of its sharp focus, and means connected to said shutter control means and to the means for controlling the correction lens and prism for coordinating the action of the shutter with the operation of said correction lens and prism.

7. In a camera comprising a casing, a photographic objective, a photographic film and means for supporting the same, a shutter between said objective and film and means for operating said shutter, an object located within said casing and outside the normal field and sharp focus of said objective, a reflecting prism and correction lens in front of said photographic objective, and means for shifting said prism and correction lens as a unit out of the axis of said photographic objective, means for operating the camera shutter in predetermined order with respect to the movements of said prism and correction lens for the purpose of photographic exposure of objects external of the casing, and for shifting said prism and correction lens into the field of the main objective and means for illuminating said `-internally located object in predetermined order with said shutter operation and prism and correction lens movement for respectively altering the effective focal length of the photographic objective and of introducing light from said internally located object into the field of said photographic objective for the purpose of photographic exposure of said internally located object.

8. In combination a camera and a casing therefor, a camera operating mechanism comprising a drive means, a shutter, and means for controlling said shutter, a main photographic objective, an object located within said casing and normally out of the axis of said objective, a correction, lens and a reflecting prism, means for shifting the same for the respective purposes of altering the effective focal length of the main photographic objective and of moving said prism into the axis of said objective and into such a position as to provide a light path between said main photographic objective and said internally located object, and means for providing illumination for said internally located object in predetermined order with respect to the operation of said shutter `and the shifting operations of' said prism and correction lens for the purpose of photographic exposure of said internally lofcated object.

9. In a camera comprising a casing, a shutter arid means for operating the same, a main photographic objective, means aligned therewith for admitting light, a movable prism and a correction lens, and means for shifting the two as a unit into and out of the axis of said objective, a stationary prism, an object located within the casing, and means for illuminating said internally located object, control means adapted to be manually instigated to bring about in the following predetermined sequence upon each manual instigatlon the operation of said shifting means to `illuminating said internally located object and bringing said movableprism into the axis of said objective and into operative relationship with said stationary prism for forming a light path between the illuminated internally located object and the objective, and simultaneously with this movement of said prism for bringing said correction lens into the objective axis for altering the focal length thereof, the actuation of said shutter tripping means for photographing said internally located object, and the subsequent extinguishing of said illuminating means.

10. In a camera comprising a casing, a shutter, a main photographic objective, means aligned therewith for admitting light, a movable reilecting prism and a correction lens, a stationary reflecting prism, an object located within the casing, control means adapted to be manually instigated to bring about in the following predetermined sequence upon each manual instigation, a movement of said prism and correction lens as a unit out of the objective axis the subsequent photographing of externally located objects, the subsequent illuminating oi said internally located object and the bringing of said movable prism into the axis of said objective and into operative relationship with said stationary prism for forming a light path between the internally located illuminated object and the objective, and the bringing of said correction lens into the objective axis for altering the focal length thereof, the photographing of said internally located illuminated object, and the subsequent extinguishing of said illuminating means.

1l. In a camera comprising a casing, a single 'photographic objective and means aligned therewith for admitting light from an external source, an internally located object, a movable reflecting means and a stationary f reflecting means, means for establishing an operative Arelationship between said movable reflecting means and said stationary reflecting means, correction lens and main objective for providing a path for the light rays caused by the illumination of said internally located object into the objective axis, and for correcting the effective focal length of the main objective, and for tripping the shutter While said elements are in this relationship and said internally located object is illuminated, said means being also adapted to bring said main photographic objective, correction lens. and movable reflecting means out of said operative relationship and to bring said main objective into operative focal relationship with said means for admitting light from` the4 exterior ofl said casing and to trip said shutter while said objective-and last named means are so positioned.

JOHN P. GtA'I'Y. 

